The app appeared to not start, although it was running in the activities panel.
To make a very long story short I deleated all Dropbox files including library files and installed 76.4.126. the installation appeared to work all the way through accepting my money. However when I started the app "NO SCREEN" no window opened and it didnot show in the task bar. I had previously turned off my Firewall. The Activities Monitor showed the app was running and there had been network activity. Is there no screen for this app, is it managed through the website?
Since you mention that you’ve already checked that it’s not your firewall that’s causing this, there is a possibility that a proxy, VPN, security software, or even ISP/router issues restricting traffic to the following Dropbox domains: https://www.dropbox.com/help/security/official-domains
If you check that this is not the case, could you also try rebooting your device? Maybe that will do the trick.
Dropbox was running before Mojave. Read my last sentence. Dropbox is running now on the computer. The activity monitor shows activity for the dropbox app. But I cannot access a window to make changes ie adding devices.
Could you please send me a screenshot(without any personal info) of what you’re attempting to access so as to have a better understanding of your concern? Are you having trouble clicking on the Dropbox icon that’s next to your computer’s clock or accessing the website by any chance?